00293nam a2200133Ia 4500100001700000650002700017490000700044654002800051245002800079260002500107082000800132300000700140546001200147  aYarwood/ A.   aElectrical Engineering  vII  aGraphical Communication  aGraphical Communication  bNelsonaLondonc1983  a1.5  a96  aENGLISH